Commit eba3b06d authored by David Fries's avatar David Fries Committed by Linus Torvalds
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W1: Document add, remove, search_count, and pullup.

Document w1_master_add, w1_master_remove, search_count, and pullup.
Signed-off-by: default avatarDavid Fries <>
Signed-off-by: default avatarEvgeniy Polyakov <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 9141f57c
......@@ -79,10 +79,13 @@ w1 master sysfs interface
<xx-xxxxxxxxxxxxx> - a directory for a found device. The format is family-serial
bus - (standard) symlink to the w1 bus
driver - (standard) symlink to the w1 driver
w1_master_add - Manually register a slave device
w1_master_attempts - the number of times a search was attempted
- the maximum slaves that may be attached to a master
w1_master_name - the name of the device (w1_bus_masterX)
w1_master_pullup - 5V strong pullup 0 enabled, 1 disabled
w1_master_remove - Manually remove a slave device
w1_master_search - the number of searches left to do, -1=continual (default)
- the number of slaves found
......@@ -90,7 +93,13 @@ w1_master_slaves - the names of the slaves, one per line
w1_master_timeout - the delay in seconds between searches
If you have a w1 bus that never changes (you don't add or remove devices),
you can set w1_master_search to a positive value to disable searches.
you can set the module parameter search_count to a small positive number
for an initially small number of bus searches. Alternatively it could be
set to zero, then manually add the slave device serial numbers by
w1_master_add device file. The w1_master_add and w1_master_remove files
generally only make sense when searching is disabled, as a search will
redetect manually removed devices that are present and timeout manually
added devices that aren't on the bus.
w1 slave sysfs interface
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